Download or read book Reconstruction of marine paleoenvironments written by Johan E. Meulenkamp and published by . This book was released on 1983 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconstruction of marine paleoenvironments written by and published by . This book was released on 1983 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconstruction of the Paleogene and Neogene Marine Paleoenvironments in the Southernmost Part of the Tarc u Nappe East Carpathians Based on Fossil Foraminifera Assemblages written by Botond Szabo (geolog.) and published by . This book was released on 2012 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconstruction of Marine Paleoenvironments written by Cornelis Willem Drooger and published by . This book was released on 1983 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reconstruction of Marine Paleoenvironments written by J. E. Meulenkamp and published by . This book was released on 1983 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Holocene Paleoenvironmental Reconstruction of Depositional Environments on the Sunda Shelf Southwest South China Sea Using a Multidisciplinary Approach written by Michael R Twarog and published by . This book was released on 2018 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last glacial maximum, ca. 21,000 years ago, caused a fall in eustatic sea level of ca. 120 m below present. The low-gradient, shallow Sunda Shelf, Southeast Asia was subaerially exposed during this sea-level lowstand and experienced rising sea level thereafter. Sea level rose to a +1.3––5 m highstand ca. 6,500 cal yr BP, and then fell to modern sea level. The objective of this research is to characterize environmental change on the Sunda Shelf in response to the post-glacial rising eustatic sea level. To address this objective, six gravity cores were collected along a transect crossing the paleo-Chao Phraya incised river valley complex between peninsular Malaysia and southern Vietnam. Thirteen AMS radiocarbon samples, 130 bulk sediment magnetic susceptibility samples (BMS), 66 X-ray fluorescence spectrometry (XRF) samples, and 54 samples for the analysis of foraminiferal assemblages were used to characterize change in the depositional environments of the cored sediments. BMS, XRF, and foraminiferal analysis distinguish two main units. Unit 1 is found in the lower part of the cores and typically contains more terrestrial material than sediments further up-core as shown by higher BMS values, higher % Ti, % Al, % Fe, and lower indicators of marine influence, for example, lower % Ca, % planktonic foraminifera, and percentages of deeper water benthic foraminifera such as Heterolepa dutemplei. Unit 2 is characterized by a significant increase in % Ca, % Heterolepa dutemplei and % planktonic foraminifera ca. 6,500 cal yr BP. Unit 1 is consistent with shallower water depths and is part of a transgressive systems tract (TST, ca. 1 m thick) that terminates ca. 6,500 cal yr BP. Unit 2 represents the overlying highstand systems tract (HST, ca. 1 m thick) and is characterized by an increase in % planktonics, % Ca, and shifts in benthic foraminiferal assemblages, indicating deeper water conditions than the sediments below. This shift from a TST to a HST ca. 6500 cal yr BP is consistent with the Sunda Shelf sea-level record.

Download or read book Image Analysis Sediments and Paleoenvironments written by Pierre Francus and published by Springer Science & Business Media. This book was released on 2007-01-19 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a guide to imaging techniques for sedimentologists, paleolimnologists, paleoceanographers and microscopists involved in paleoenvironmental reconstruction. Case studies illustrate the range of information obtainable from different sediments (marine, lacustrine, aeolian) and different types of samples (cores, embedded blocks, microscopic slides) using different regions of the electromagnetic spectrum (visible, UV, IR, X-ray). Includes comprehensive protocols, guidelines, and recommendations for the use of low cost image analysis techniques.

Download or read book Arctic Ocean Sediments Processes Proxies and Paleoenvironment written by R. Stein and published by Elsevier. This book was released on 2008-07-22 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although it is generally accepted that the Arctic Ocean is a very sensitive and important region for changes in the global climate, this region is the last major physiographic province of the earth whose short-and long-term geological history is much less known in comparison to other ocean regions. This lack of knowledge is mainly caused by the major technological/logistic problems in reaching this harsh, ice-covered region with normal research vessels and in retrieving long and undisturbed sediment cores. During the the last about 20 years, however, several international and multidisciplinary ship expeditions, including the first scientific drilling on Lomonosov Ridge in 2004, a break-through in Arctic research, were carried out into the central Artic and its surrounding shelf seas. Results from these expeditions have greatly advanced our knowledge on Arctic Ocean paleoenvironments. Published syntheses about the knowledge on Arctic Ocean geology, on the other hand, are based on data available prior to 1990. A comprehensive compilation of data on Arctic Ocean paleoenvironment and its short-and long-term variability based on the huge amount of new data including the ACEX drilling data, has not been available yet. With this book, presenting (1) detailed information on glacio-marine sedimentary processes and geological proxies used for paleoenvironmental reconstructions, and (2) detailed geological data on modern environments, Quaternary variability on different time scales as well as the long-term climate history during Mesozoic-Tertiary times, this gap in knowledge will be filled. *Aimed at specialists and graduates *Presents background research, recent developments, and future trends *Written by a leading scholar and industry expert

Download or read book A Multiproxy Paleoenvironmental Reconstruction of Late Quaternary Marine Sediments written by Bailey G. Donovan and published by . This book was released on 2017 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two gravity cores were collected from 43 km and 90 km offshore of Kuala Terengganu (western Sunda Shelf, southern South China Sea) at ~60 m water depth to characterize late Quaternary paleoenvironments by using bulk sediment magnetic susceptibility (BMS), elemental analysis via X-ray fluorescence spectrometry (XRF), and foraminiferal analyses. Radiocarbon age estimates (using benthic foraminiferal carbonate material) indicated the nearshore core was Holocene (ca. 10,000-6,000 cal years BP) in age while the offshore core was deposited prior to the last glacial maximum (ca. 45,000 cal years BP and possibly older) during marine isotope stage (MIS) 3 (ca. 60,000 - 30,000 yrs BP) within the late Pleistocene. Elemental and BMS data agree well within both cores, except Pleistocene sediments exhibit higher BMS (ca. 1x10-4 si) and higher calcium content (ca. 2%) than Holocene sediments. These data can be interpreted as representing stronger terrestrial influence during the deposition of Pleistocene sediments or a higher dissolution of calcium carbonate. BMS data, elemental data, and micropaleontological evidence, relative abundances of 64 benthic foraminiferal species, indicate that both cores were deposited in an inner shelf environment similar to the modern shelf environment at ca. 50-60 m water depth. However, a higher ratio of planktonic foraminifera (Holocene: 0-1.3%, Pleistocene: 0-8.5%) suggests a greater influence of open marine waters in the Pleistocene sediments. The position of sea level during deposition of the late Pleistocene cored sediments is higher (ca. 60-0 m depending on the data set) than eustatic published sea-level data for MIS 3. This incongruity could be caused by age inaccuracies from limitations of the radiocarbon dating technique, although this seems unlikely as the lower range of age estimates fall within the technique and the uppermost range falls on the border of the limitations of the technique. Other options for the incongruity include large margins of error for late Pleistocene sea-level reconstruction and vertical crustal movement post-deposition from isostatic adjustment or tectonic activity.

Download or read book Nearshore Marine Paleoenvironmental Reconstruction of Southwest Florida During the Pliocene and Pleistocene written by Jennifer Leigh Sliko and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Future climate change has been the subject of considerable speculation with scientists called upon to predict timing, magnitude, and impact of these changes. The Pliocene Warm Period serves as the best-available, pre-modern analog to predicted climate changes, and Pliocene climate anomalies are examined as possible scenarios for future climate change. Comparing modern conditions to the mean climate state of the Pliocene is essential for better constrained predictions of future climate change, and seasonal paleoenvironmental records provide a data set more analogous to instrumental observations and thereby reducing the uncertainty in modeled climate changes. This study first examines the potential of large gastropod shells as a paleoclimate proxy. Specimens of Busycon sinistrum, active in winter, and Fasciolaria tulipa, active in the summer, were collected alive from Tampa Bay and St. Joseph Bay in the hope of establishing a multi-year record of seasonality. The delta18omicron time series of each shell were compared with predicted delta18omicron, based on local marine temperature variations, and both species cease shell growth during the winter months, despite opposing seasons of feeding activity. As none of the profiles provide information on winter environmental parameters, this sclerochronological system was replaced by work on pristine specimens of the scleractinian coral Siderastrea spp. Seasonal delta18omicron and strontium/calcium time series from two Pliocene corals, collected from the Lower Pinecrest Member of the Tamiami Formation in southwest Florida, were used to calculate seawater delta18omicron variations. Inferred salinity in the Pliocene has a reversed seasonal pattern from that of modern annual salinity variations, and is interpreted to be a response to an increase in winter precipitation, a teleconnection of the Pliocene "Super El Niño." Concentrations of variance in the typical ENSO frequency band are not apparent above the 95% confidence interval, suggesting that the Pliocene was dominated by a perennial, rather than an intermittent, El Niño-like state. Further geochemical analyses from both Pliocene and Pleistocene Siderastrea spp. corals indicate a high nutrient nearshore marine environment in south Florida. Marine phosphates, inferred from phosphorus/calcium analyses, were significantly higher in the Pliocene Tamiami Fm. than in the Early Pleistocene Caloosahatchee and Bermont Fms, and the decline in nutrients preceded local extinction by> 0.5 Ma. Additionally, high-resolution phosphorus/calcium analyses of an individual coral reveal no evidence of seasonality required by a previously hypothesized upwelling-based nutrient delivery mechanism. The Pliocene nearshore marine environment in southwest Florida was characterized by higher nutrients than in the Pleistocene and precipitation patterns similar to modern El Niño teleconnections.

Download or read book Paleoenvironmental Reconstruction of an Early Miocene Depositional Environment at Mathesons Bay New Zealand written by Thomas Stolberger and published by . This book was released on 2020 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tectonically active areas will have a strong influence on relative sea level change in coastal environments, and subsequently the biological communities inhabiting coastal and other associated marine environments. Paleoenvironmental reconstruction provides insights of the nature of coastal/marine response to tectonic activity, and how similar environments may be expected to respond in modern environments. The Early Miocene Waitemata Group strata outcropping at Mathesons Bay near Leigh, North Island, New Zealand is an example of a coastal environment which has significantly changed in response to active tectonics in the region. The strata at Mathesons Bay conforms to 10 lithofacies units that represent the existence of a number of different depositional environments developed during sea level transgression over an irregular Mesozoic Waipapa Group surface. Divided into the basal coarser grained Kawau Subgroup and the turbidite-dominated Warkworth Subgroup, they demonstrate a period of rapid subsidence in the intra-arc Waitemata Basin beginning ~22 Ma. These strata record the evolution of Mathesons Bay throughout this subsidence in four distinct stages, including: the transgressing of a rocky coast; basinal subsidence during a period of sediment starvation; the reinitiation of sedimentation, and the formation of an unusual hydrocarbon cold seep. This study utilised lithologic, paleoecologic and petrographic analyses to identify and characterise lithofacies units and reconstruct the paleoenvironment. This was achieved through the construction of field maps and lithologic logs, the sampling of different lithologic units and associated macrofossils, petrographic analysis, and fossil/paleoecological identification.

Download or read book Paleozoology and Paleoenvironments written by J. Tyler Faith and published by Cambridge University Press. This book was released on 2019-02-21 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleozoology and Paleoenvironments outlines the reconstruction of ancient climates, floras, and habitats on the basis of animal fossil remains recovered from archaeological and paleontological sites. In addition to outlining the ecological fundamentals and analytical assumptions attending such analyzes, J. Tyler Faith and R. Lee Lyman describe and critically evaluate many of the varied analytical techniques that have been applied to paleozoological remains for the purpose of paleoenvironmental reconstruction. These techniques range from analyses based on the presence or abundance of species in a fossil assemblage to those based on taxon-free ecological characterizations. All techniques are illustrated using faunal data from archaeological or paleontological contexts. Aimed at students and professionals, this volume will serve as fundamental resource for courses in zooarchaeology, paleontology, and paleoecology.

Download or read book Applications of Paleoenvironmental Techniques in Estuarine Studies written by Kaarina Weckström and published by Springer. This book was released on 2017-02-13 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this edited volume is to introduce the scientific community to paleoenvironmental studies of estuaries, to highlight the types of information that can be obtained from such studies, and to promote the use of paleoenvironmental studies in estuarine management. Readers will learn about the the application of different paleoecological approaches used in estuaries that develop our understanding of their response to natural and human influences. Particular attention is given to the essential steps required for undertaking a paleoecological study, in particular with regard to site selection, core extraction and chronological techniques, followed by the range of indicators that can be used. A series of case studies are discussed in the book to demonstrate how paleoecological studies can be used to address key questions, and to sustainably manage these important coastal environments in the future. This book will appeal to professional scientists interested in estuarine studies and/or paleoenvironmental research, as well as estuarine managers who are interested in the incorporation of paleoenvironmental research into their management programs.

Download or read book Human Impacts on Ancient Marine Ecosystems written by Torben C. Rick and published by Univ of California Press. This book was released on 2008-04-29 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: “An excellent volume with mature, sophisticated, comprehensive research by leaders in the fields of archaeology, zooarchaeology, and paleoarchaeology that will be useful to scientists of many interests.”—David Steadman, author of Extinction and Biogeography of Tropical Pacific Birds “This volume will make a significant contribution to our understanding of ancient human impacts on marine ecosystems, which will be of interest to all researchers who are concerned about the environment. The editors and contributors are commended for their efforts on this significant research topic.”—Steven R. James, coeditor of The Archaeology of Global Change: The Impact of Humans on Their Environment

Download or read book Reconstruction of the Paleo Asian Ocean written by Robert G. Coleman and published by VSP. This book was released on 1994 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings volume contains selected papers from two symposia which were held during the 29th International Geological Congress, Kyoto, Japan, 24 August--3 September, 1992. The first symposium --- ''Reconstruction of the Paleo-Asian Ocean'' --- contains 11 papers from a group of scientists working together in an international project of the same name. The goal of the project is to collect and evaluate petrologic and tectonic data within specific terranes so as to understand the geodynamic processes leading to the amalgamation of Asia. These papers represent vital geological discussions for interpreting the geodynamic maps being produced by the project. From the second symposium of this volume --- ''Quaternary Environmental Change'' --- 14 papers were selected. The wide range of topics can be divided as follows: Deep sea core analysis; Coral reef and nearshore environment; Paleoenvironmental analysis; Tephras, Loess and Pedology; River morphology and others.

Download or read book Pleistocene Holocene Sea Level Change in the Georgia Bight written by Sherri Lynn Littman and published by . This book was released on 2000 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Submerged Landscapes of the European Continental Shelf written by Nicholas C. Flemming and published by John Wiley & Sons. This book was released on 2017-08-07 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quaternary Paleoenvironments examines the drowned landscapes exposed as extensive and attractive territory for prehistoric human settlement during the Ice Ages of the Pleistocene, when sea levels dropped to 120m-135m below their current levels. This volume provides an overview of the geological, geomorphological, climatic and sea-level history of the European continental shelf as a whole, as well as a series of detailed regional reviews for each of the major sea basins. The nature and variable attractions of the landscapes and resources available for human exploitation are examined, as are the conditions under which archaeological sites and landscape features are likely to have been preserved, destroyed or buried by sediment during sea-level rise. The authors also discuss the extent to which we can predict where to look for drowned landscapes with the greatest chance of success, with frequent reference to examples of preserved prehistoric sites in different submerged environments. Quaternary Paleoenvironments will be of interest to archaeologists, geologists, marine scientists, palaeoanthropologists, cultural heritage managers, geographers, and all those with an interest in the drowned landscapes of the continental shelf.